Fast-acting fluid control valve

a fluid control valve and fast-acting technology, applied in the direction of valve operating means/release devices, pressure relieving devices on sealing faces, transportation and packaging, etc., can solve the problem of limited speed, achieve faster opening and closing, reduce moving mass, and reduce the effect of moving distan

Inactive Publication Date: 2007-12-20
PURDUE RES FOUND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006] The present invention provides a fast-acting fluid control valve capable of opening and closing more rapidly than existing valves of comparable size (flow area) because of a reduced moving mass, decreased moving distance, and increased actuator properties.

Problems solved by technology

While the spool is capable of rapidly opening and closing in part due to the very small size of the spool, speed is limited by inherent eddy currents in the spool and the relatively large mass of the spool resulting from its relatively thick wall.
Nonetheless, the spool is a check valve that cannot open against very high pressures because it is not axially balanced.

Method used

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Examples

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Embodiment Construction

[0026]FIGS. 1 through 18 illustrate several embodiments of valve assemblies configured in accordance with the present invention. It should be noted that the Figures are drawn for purposes of clarity when viewed in combination with the following description, and therefore are not necessarily to scale.

[0027] An original and general goal for valve assemblies of this invention is to exhibit a pressure drop of about 1 bar at flow rates of about 10 liters per minute (lpm), and the ability go from a fully closed to a fully open position, and vice versa, in about 0.5 milliseconds (ms) or less. Further goals were for valve assemblies that are suitable for high volume manufacturing, consume little energy, and are reliable for millions of cycles. While such goals are intended, valve assemblies that do not meet these goals but otherwise incorporate key design feature of this invention are also within the scope of the invention.

[0028] Basic components of valve assemblies of this invention incl...

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Abstract

A fluid control valve capable of rapidly opening and closing. The valve includes a housing with an annular-shaped spool cavity that contains an annular-shaped spool capable of axial movement within the spool cavity between first and second spool positions. The spool has axially-spaced circumferential spool sealing features and optionally radial passages therethrough. The housing has axially-spaced circumferential housing sealing features configured and disposed within the spool cavity so that, with the spool in the first spool position, fluid flow is enabled through the spool cavity axially between the spool sealing features and the housing sealing features, which provide axial force balancing of the spool. With the spool in the second spool position, the spool sealing features and the housing sealing features cooperate to substantially prevent fluid flow through the spool cavity.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application claims the benefit of U.S. Provisional Application No. 60 / 747,427, filed May 17, 2006, the contents of which are incorporated herein by reference.BACKGROUND OF THE INVENTION [0002] The present invention generally relates to fluid control valves. More particularly, this invention relates to a fast-acting fluid control valve capable of opening and closing more quickly that conventional valves of comparable flow capacity as a result of reduced moving mass, decreased stroke distance, and increased actuator properties, which preferably include reduced magnetic diffusion time (less lag before activation / deactivation) and increased force to mass ratio. [0003] Research efforts have been made to design fluid control valves with rapid opening and closing speeds. Examples include U.S. Pat. Nos. 6,105,616 and 6,474,353 to Sturman et al., which disclose a valve with two connected flow paths defined at the outer circumferential surfa...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F16K47/08
CPCF16K31/0675F16K11/0716Y10T137/86759
Inventor BATDORFF, MARK A.LUMKES, JOHN H. JR.
Owner PURDUE RES FOUND INC
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